Ludwig mond



N UNITED STATES PATENT OF ICE.

nnwm MOND, or LONDON, ENGLAND.

. PROCESS OF DEPOSITING NICKEL.

SPECIFICATION forming part ofLetters Patent No. 455,230, dated June 30,1891. Application filed November 11, 1890- Seriel No. 371,099. (No specimens.)

' Great Britain, of Regents Park, London, in

the county of Middlesex, in the Kingdom-of England, have invented a certain new and useful Improvement in Making Sheets, Stereotypes, Casts, and Coatings of Nickel, of which the following is a specification.

This invention relates to a process for platin g or coating all kinds of goods metallic and non-metallic, capable of standing a moderate heat, with a compact coating ofnickel by means of a compound of nickel with carbon monoxide, called nickel-carbon. oxide. This nickel-carbon oxide is a liquid boiling at 43 centigrade, soluble in a large number of organic compounds, such as benzole and petroleum, and readily volatile at ordinary temperature in a current of other gases which have no chemical action on it, such as car-' bon monoxide, carbon dioxide, hydrogen, and

nitrogen.

The nickel-carbon oxide and the method of preparing the same have heretofore been made public by me, and are generally understood by those skilled in the art. A method of producing the same by exposing an oxide of nickel to the reducing action .of carbon monoxide, hydrogen, or a hydrocarbon at a temperature of about 350 to 400 centigrade, cooling the reduced oxide belowl150 centi grade, and treating it with carbon monoxide, is fully described in two applications for Letters Patentof'the United States filed November (3,1890, Serial Nos. 371,096 and 371,098, and patented of even date herewith.

Tocarryout myinvention I heat the goods to be coated to a suitable temperature and expose them to the vapor of the nickel-carbon oxide, preferably diluted with nitrogen and hydrogen, as in water-gas, or I immerse the heated goods in the liquid nickelcarbon oxide or a solution of this compound. The goods should have a clean metal surface or be coated with graphite or other suitable material. In this waynickel plating, obtaining casts similar to nickel elcctroplates, and the manufacture of thin sheet-nickel or tubes can be carried on. To effect this, bright metallic or suitably coated surfaces or goods are heated to 180 centigrade or more, and exposed to the vapor of the nickel-carbon oxide,

(preferably diluted with an inert gas,) or the heated goods are brought into contact with the-liquid nickel-carbon oxide or a solution of this compound by immersion or otherwise. The solution is effected by adding the nickel carbon oxide to benzole, petroleum, or other solvent. The nickel commences to deposit upon the goods immersed in the liquid or its solution at a temperature of 60.to centigrade, and in the vapor at about cen tigrade; but the exact temperature to which the goods have to be heated depends upon the thickness, color, and nature of the coating which it is desired to obtain, and also.

sists in heating the article to be plated, and

bringing it in contact with nickel-carbon oxide.

2. The process of obtaining stereotypes,

casts, or copies of engraved surfaces or patterns in relief, which consists in exposing the surface to be copied in a heated condition to n ick el-carbon oxide, and separating the nickel coating from the matrix. Y

2- The process of obtaining sheet-nickel,

which consists in exposing a heated surfacev to nickel-carbon oxide, and separating the nickel from the said surface.

4. The process of obtaining a nickel tube, which consists in exposing a suitable core coated with graphite or other suitable substance in a heated state to nickel-carbon oxide and extracting the nickel tube formed from the core. v

The process of depositing nickel upon a tact with the solution of nickel-carbon oxide. name to this specification in the presence of 6. In the process of depositing nickel upon two subscribing witnesses. a surface, the step consisting in bringing the LUDXVIG MOND. 5 heated surface in contact with a mixture of nickel-carbon oxide with inert gases, such as nitrogen and hydrogen.

surfaceby bringingtheh'eartedsurface in con-t In testimony whereof I have signed my \Vitnesses:

WM. P. THOMPSON, JOHN HAYES. 

